Shadows and rings of the Kehagias-Sfetsos black hole surrounded by thin disk accretion
In this paper, under the illumination of thin disk accretion, we have employed the ray-tracing method to carefully investigate shadows and rings of the Kehagias-Sfetsos(KS) black hole in deformed Hořava-Lifshitz(HL) gravity. The results show that the event horizon $r_+$, the radius $r_p$ and impact...
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ftdatacite:10.48550/arxiv.2105.08521 2023-05-15T17:39:57+02:00 Shadows and rings of the Kehagias-Sfetsos black hole surrounded by thin disk accretion Li, Guo-Ping He, Ke-Jian 2021 https://dx.doi.org/10.48550/arxiv.2105.08521 https://arxiv.org/abs/2105.08521 unknown arXiv https://dx.doi.org/10.1088/1475-7516/2021/06/037 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ General Relativity and Quantum Cosmology gr-qc High Energy Physics - Theory hep-th FOS Physical sciences article-journal Article ScholarlyArticle Text 2021 ftdatacite https://doi.org/10.48550/arxiv.2105.08521 https://doi.org/10.1088/1475-7516/2021/06/037 2022-03-10T14:30:48Z In this paper, under the illumination of thin disk accretion, we have employed the ray-tracing method to carefully investigate shadows and rings of the Kehagias-Sfetsos(KS) black hole in deformed Hořava-Lifshitz(HL) gravity. The results show that the event horizon $r_+$, the radius $r_p$ and impact parameter $b_{p}$ of photon sphere are all decreased with the increase of the HL parameter $ω$, but the effective potential increases. And, it also turns out that the trajectories of light rays emitted from the north pole direction are defined as the direct emission, lensing ring and photon ring of KS black hole, on the basis of orbits $n = ϕ/2π$. As black hole surrounded by thin disk accretion, we show that the corresponding transfer functions have their values increased with the parameter $ω$. More importantly, we also find that the direct emissions always dominate the total observed intensity, while lensing rings as a thin ring make a very small contribution and photon ring as a extremely narrow ring make a negligible contribution, for all three toy-model functions. In view of this, the results finally imply that shadows and rings as the observational appearance of KS black hole exhibit some obvious interesting features, which might be regarded as an effective way to distinguish black holes in HL gravity from the Schwarzschild black hole. : 17 pages, 28 figures, minor revisions, references added Article in Journal/Newspaper North Pole DataCite Metadata Store (German National Library of Science and Technology) North Pole |
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DataCite Metadata Store (German National Library of Science and Technology) |
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topic |
General Relativity and Quantum Cosmology gr-qc High Energy Physics - Theory hep-th FOS Physical sciences |
spellingShingle |
General Relativity and Quantum Cosmology gr-qc High Energy Physics - Theory hep-th FOS Physical sciences Li, Guo-Ping He, Ke-Jian Shadows and rings of the Kehagias-Sfetsos black hole surrounded by thin disk accretion |
topic_facet |
General Relativity and Quantum Cosmology gr-qc High Energy Physics - Theory hep-th FOS Physical sciences |
description |
In this paper, under the illumination of thin disk accretion, we have employed the ray-tracing method to carefully investigate shadows and rings of the Kehagias-Sfetsos(KS) black hole in deformed Hořava-Lifshitz(HL) gravity. The results show that the event horizon $r_+$, the radius $r_p$ and impact parameter $b_{p}$ of photon sphere are all decreased with the increase of the HL parameter $ω$, but the effective potential increases. And, it also turns out that the trajectories of light rays emitted from the north pole direction are defined as the direct emission, lensing ring and photon ring of KS black hole, on the basis of orbits $n = ϕ/2π$. As black hole surrounded by thin disk accretion, we show that the corresponding transfer functions have their values increased with the parameter $ω$. More importantly, we also find that the direct emissions always dominate the total observed intensity, while lensing rings as a thin ring make a very small contribution and photon ring as a extremely narrow ring make a negligible contribution, for all three toy-model functions. In view of this, the results finally imply that shadows and rings as the observational appearance of KS black hole exhibit some obvious interesting features, which might be regarded as an effective way to distinguish black holes in HL gravity from the Schwarzschild black hole. : 17 pages, 28 figures, minor revisions, references added |
format |
Article in Journal/Newspaper |
author |
Li, Guo-Ping He, Ke-Jian |
author_facet |
Li, Guo-Ping He, Ke-Jian |
author_sort |
Li, Guo-Ping |
title |
Shadows and rings of the Kehagias-Sfetsos black hole surrounded by thin disk accretion |
title_short |
Shadows and rings of the Kehagias-Sfetsos black hole surrounded by thin disk accretion |
title_full |
Shadows and rings of the Kehagias-Sfetsos black hole surrounded by thin disk accretion |
title_fullStr |
Shadows and rings of the Kehagias-Sfetsos black hole surrounded by thin disk accretion |
title_full_unstemmed |
Shadows and rings of the Kehagias-Sfetsos black hole surrounded by thin disk accretion |
title_sort |
shadows and rings of the kehagias-sfetsos black hole surrounded by thin disk accretion |
publisher |
arXiv |
publishDate |
2021 |
url |
https://dx.doi.org/10.48550/arxiv.2105.08521 https://arxiv.org/abs/2105.08521 |
geographic |
North Pole |
geographic_facet |
North Pole |
genre |
North Pole |
genre_facet |
North Pole |
op_relation |
https://dx.doi.org/10.1088/1475-7516/2021/06/037 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.2105.08521 https://doi.org/10.1088/1475-7516/2021/06/037 |
_version_ |
1766140714088923136 |